Display device and HUD device having same

Abstract

The utility model provides a display device which can improve the light utilization rate of a backlight source. In addition, the utility model further provides an HUD device with the display device. The display device of the utility model comprises a frame; the display screen is mounted on one side of the frame; the backlight source is arranged on the other side of the frame and emits light to the display screen; a housing, one end of the housing being mounted to the frame, the backlight being mounted to the other end of the housing, a reflecting surface being formed inside the housing, the backlight and the back side of the display screen facing each other in a space surrounded by the housing; and the reflecting part is arranged in the space surrounded by the shell and covers an area which does not need to be displayed in a design display area of the display screen, and the reflecting part is opposite to the reflecting surface.

Description

Technical Field

[0001] The utility model relates to the technical field of display equipment, and in particular to a display device and a HUD device having the same. Background Art

[0002] As vehicles like cars become increasingly sophisticated, HUDs (head-up displays) are being incorporated into them. In addition to replacing instrument clusters and displaying various dashboard information (such as speed, tire pressure, fuel consumption, speed limits, and warnings), in-vehicle HUDs can also display navigation, assisted driving, and automated driving information, typically displayed on the central multimedia screen. This allows drivers to virtually eliminate the need to look down while driving, significantly improving driving safety.

[0003] However, under sunlight or strong light sources, the HUD display may be disrupted, making it difficult for the driver to see clearly. Therefore, it is necessary to improve the light utilization efficiency of the backlight source, thereby enhancing the brightness of the HUD display and, to a certain extent, reducing the interference of ambient light on the display. To improve the light utilization efficiency of the backlight source, known solutions often use complex light collection components between the backlight source and the display screen, resulting in a complex optical path. Utility Model Content

[0004] The present invention aims to at least partially address one of the known technical problems. To this end, a display device is provided that improves the light utilization efficiency of a backlight source. Furthermore, the present invention also provides a head-up display (HUD) device having the display device.

[0005] According to the first aspect of the present invention, the display device includes: a frame; a display screen, which is installed on one side of the frame; a backlight source, which is arranged on the other side of the frame and emits light to the display screen; a shell, one end of the shell is installed to the frame, and the backlight source is installed to the other end of the shell, a reflective surface is formed inside the shell, and the back side of the back light source and the display screen are opposite to each other in the space surrounded by the shell; a reflector, which is arranged in the space surrounded by the shell and covers an unnecessary display area in the designed display area of ​​the display screen, and the reflector and the reflective surface are opposite to each other.

[0006] Beneficial effects

[0007] The display device according to the first aspect of the present invention can improve the light utilization efficiency of the backlight source.

[0008] In some embodiments, the frame has a first opening in the middle; the display screen has non-display areas on all four edges, and the non-display areas surround the designed display area; the display screen is mounted to the frame in the non-display area, and the designed display area is exposed in the first opening.

[0009] In some embodiments, the reflective element is attached to the back of the display screen and covers the unnecessary display area.

[0010] In some embodiments, the design display area is a rectangular area, and the reflector covers one long side or one short side of the design display area, or the reflector surrounds the design display area and covers the four edges of the design display area.

[0011] In some embodiments, a cover plate is further included, which is mounted to the frame from the front side of the display screen; the cover plate is formed with a shielding portion, which shields an unnecessary display area in the designed display area of ​​the display screen.

[0012] In some embodiments, the reflective member is a reflective film.

[0013] In some embodiments, the reflective surface includes a first reflective surface formed on an inner wall surface of the shell, and / or a second reflective surface formed on a bottom surface of the shell.

[0014] In some embodiments, the housing is formed such that a cross section gradually increases from a side of the backlight source toward a side of the frame.

[0015] In some embodiments, the frame is in a rectangular frame shape, and a rectangular first opening is provided in the middle of the frame; the housing has four flat-plate-shaped side walls, and the four side walls are connected to each other to define the rectangular cross section;

[0016] The housing has a second rectangular opening formed at one end mounted on the frame, and the second opening is symmetrically opposite to the first opening.

[0017] In some embodiments, the shell is made of a reflective material, or a reflective layer is formed on the inner wall surface, or a reflective device is installed on the inner wall surface.

[0018] In some embodiments, the backlight source includes a mounting plate, the mounting plate is mounted to the bottom of the housing, and the second reflective surface is formed on the mounting plate.

[0019] In some embodiments, the invention further includes at least one of a diffuser, a light concentrator, and a light guide disposed between the display screen and the housing.

[0020] A HUD device according to a second aspect of the present invention includes any one of the display devices described above.

[0021] Beneficial effects

[0022] In the HUD device according to the second aspect of the present invention, since the display device can improve the light utilization rate of the backlight source, the brightness of the display content of the HUD device can be enhanced as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of an embodiment of the display device of the present invention.

[0024] Figure 2 yes Figure 1 Cross-sectional view at AA in.

[0025] Figure 3 It is a cross-sectional schematic diagram of an embodiment of a HUD device having a display device of the present invention.

[0026] Description of Reference Numerals

[0027] 100: Display device; 101: Frame; 102: Display screen; 103: Backlight source; 104: Housing; 104a: Side wall; 105: Reflector; 106: Inner wall surface; 107: Designed display area; 107a: Actual display area; 107b: Area not requiring display; 108: First opening; 109: Non-display area; 110: Cover plate; 111: Shielding portion; 112: Avoidance groove; 113: Second opening; 114: Mounting plate; 115: LED lamp; 116: Mounting surface; 117: Diffuser; 118: Concentrator; 119: Reflective surface; 119a: First reflective surface; 119b: Second reflective surface; 200: HUD device; 201: Housing; 202: Optical component; 203: Accommodating cavity; 204: Window; 205: Reflector; 206: Lens. DETAILED DESCRIPTION

[0028] Examples of the present embodiment are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present embodiment and are not to be construed as limiting the present embodiment.

[0029] In the description of this embodiment, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this embodiment.

[0030] In the description of this embodiment, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0031] In the description of this embodiment, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this embodiment based on the specific content of the technical solution.

[0032] Reference Figure 1 as well as Figure 2 According to the first embodiment, the display device 100 includes: a frame 101, a display screen 102, a backlight source 103, a housing 104, and a reflector 105. The display screen 102 is mounted on one side of the frame 101. The backlight source 103 is provided on the other side of the frame 101 and emits light to the display screen 102. One end of the housing 104 is mounted to the frame 101, and the backlight source 103 is mounted to the other end of the housing 104. A reflective surface 119 is formed inside the housing 104. The back side of the backlight source 103 and the display screen 102 are opposite to each other in the space surrounded by the housing 104. The reflector 105 is provided in the space surrounded by the housing 104 and covers a portion of the designed display area 107 of the display screen 102. The reflector 105 and the reflective surface 119 are opposite to each other. It should be noted that the term "opposite" used in the embodiments refers to the two being opposite to each other along the light propagation path. For example, if at least a portion of the light reflected by the reflector 105 can directly illuminate the reflective surface 119, the reflector 105 and the reflective surface 119 are considered to be opposite to each other, and this does not necessarily mean that the two are parallel to each other. Thus, light emitted by the backlight source 103 toward the back side of the display screen 102 partially illuminates the reflector 105, and light reflected by the reflector 105 again illuminates the reflective surface 119 inside the housing 104, passing through the reflective surface 119 and irradiating the back side of the display screen 102.

[0033] The display device 100 of the embodiment can improve the light utilization efficiency of the backlight source 103. Specifically, the HUD device 200 (described below) used in automobiles may have different housing sizes and structures depending on the vehicle model. However, due to the complexity of production lines for display screens 102 (e.g., liquid crystal displays), it is difficult to configure independent, non-standard display screens 102 for each of these HUD devices 200 with various shapes. To this end, when assembling the HUD device 200, a larger display screen 102 is typically used, and portions of the display screen 107 are shielded to prevent the backlight source 103 from directly illuminating these undesired areas. In this embodiment, by using a reflector 105 to shield the undesired display areas 107b of the display screen 102, not only can the display screen size be controlled according to the actual needs of the HUD device 200, but light that would otherwise be irradiated in these undesired display areas 107 can also be reflected back and reused through the housing 104 having the reflective surface 119, thereby improving the light utilization efficiency of the backlight source 103. The frame 101 of the display device 100 of the embodiment is rectangular. It should be noted that, in this specification, a square is considered a form of a rectangle. The frame 101 has a rectangular first opening 108 in the middle. The frame 101 can be formed, for example, by resin injection molding.

[0034] The display screen 102 is rectangular in shape as a whole. From a design perspective, the display screen 102 has a non-display area 109 on all four edges, and the non-display area 109 surrounds the designed display area 107 (that is, the area originally provided by the display screen 102). The display screen 102 is mounted to the frame 101 in the non-display area 109, and the designed display area 107 is exposed in the first opening 108. The display screen 102 can be attached to the front side of the frame 101 by, for example, adhesives such as glue or tape. In addition, the display screen 102 can also be mounted to the front side of the frame 101 by, for example, various mounting methods such as snapping and clamping. The length and width dimensions of the designed display area 107 can be the same as the length and width dimensions of the first opening 108 of the frame 101.

[0035] The display device 100 may also include a cover plate 110, which is attached to the frame 101 from the front side of the display screen 102. The cover plate 110 is formed with a shielding portion 111, which shields the unnecessary display area 107b within the designed display area 107 of the display screen 102. For example, a rectangular escape groove 112 is formed through the middle of the cover plate 110. The length and width of the escape groove 112 can be the same as the length and width of the actual display area 107a required to be displayed on the display screen 102 of the HUD device 200. In other words, at least one of the length and width of the escape groove 112 of the cover plate 110 is smaller than the length and width of the designed display area 107 of the display screen 102. The cover plate 110 is attached to the frame 101 from the front side of the display screen 102, thereby shielding the unnecessary display area 107b within the designed display area 107 of the display screen 102. The cover 110 can be mounted on the frame 101 by various well-known methods, such as gluing, screw connection, and snap connection.

[0036] The reflector 105 is attached to the back of the display screen 102 and blocks a portion of the display screen 102's designed display area 107. Specifically, the reflector 105 blocks an unnecessary display area 107b of the display screen 102's designed display area 107. When viewed from the front, the reflector 105 overlaps with a blocking portion 111 of the cover plate 110 that blocks the unnecessary display area 107b of the display screen 102. In other words, to reduce the design display area 107 of the display screen 102, the reflector 105 blocks light from the back of the display screen 102, while the cover plate 110 blocks the portion of the display screen 102 corresponding to the reflector 105 from the front. This reduces the design display area 107 of the display screen 102.

[0037] The designed display area 107 of the display screen 102 is rectangular, and the reflector 105 covers one long side or one short side of the designed display area 107. It should be noted that when the designed display area 107 is square, any edge of the designed display area 107 can be considered a long side or a short side. For example, when the display screen of a specific HUD device 200 only requires a portion of the width of the designed display area 107 of the display screen 102, the reflector 105 covers one long side of the designed display area 107. When the display screen of the HUD device 200 only requires a portion of the length of the designed display area 107 of the display screen 102, the reflector 105 covers one short side of the designed display area 107. Furthermore, when the display screen of the HUD device 200 requires the entire actual display area 107a of the display screen 102 to be reduced, the reflector 105 surrounds the designed display area 107 and covers the edges of the designed display area 107, thereby forming an actual display area 107a with a reduced length and width.

[0038] The reflective member 105 may be a reflective film directly attached to the back of the display screen 102. The reflective film may be either a soft film or a hard film. Furthermore, the reflective member 105 may be a fully reflective film. The material of the reflective film is not particularly limited and may be, for example, organic glass, ABS, aluminized, PVC, or PET.

[0039] The reflective surface 119 formed inside the housing 104 can reflect the light from the backlight source 103 and the light reflected from the reflector 105. For example, the housing 104 has four flat side walls 104a, which are connected to each other to define a rectangular cross-section. In addition, the cross-section of the housing 104 can be formed to gradually increase from the side of the backlight source 103 toward the side of the frame 101. The housing 104 forms a rectangular second opening 113 at one end mounted to the frame 101, and the second opening 113 and the first opening 108 are symmetrically opposite. For example, the length and width of the second opening 113 are respectively the same as the length and width of the first opening 108. When the housing 104 is mounted to the frame 101, the second opening 113 and the first opening 108 transition smoothly, thereby improving the housing 104's ability to reflect light.

[0040] The internal reflective surface 119 of the housing 104 may include a first reflective surface 119 a formed on the inner sidewall surfaces 106 of the four sidewalls 104 a of the housing and a second reflective surface 119 b formed on the bottom of the housing.

[0041] The first reflective surface 119a can be formed, for example, as follows. For example, the material of the housing 104 can be a reflective material. The reflective material can be a mirror-finished stainless steel material or a high-purity aluminum plate. Furthermore, a reflective layer can be formed on the inner wall 106 of the housing 104. This reflective layer can be attached to the inner wall 106 of the housing 104, for example, by coating. For example, the inner wall 106 or the entire housing 104 can be plated with aluminum, silver, or gold. Alternatively, a reflective device (not shown) can be mounted on the inner wall 106. This reflective device can be made of the same material as the reflective member 105 attached to the back of the display screen 102. For example, the reflective device can be a reflective film, which is attached to the inner wall 106 of the housing 104 by coating. This can improve the reflective capability of the inner wall 106 of the housing 104, thereby improving the light utilization efficiency of the backlight source 103.

[0042] The backlight source 103 includes a mounting plate 114 and a plurality of LED lamps 115 disposed on the mounting plate 114. The mounting plate 114 of the backlight source 103 can be mounted to the housing 104 by various mounting methods such as screw locking and snap fastening. The mounting plate 114 of the backlight source 103 can be mounted to the bottom of the housing 104 in parallel with the display screen 102. When the mounting plate 114 of the backlight source 103 is mounted to the bottom of the housing 104, the LED lamps 115 are surrounded by the housing 104, so that the light emitted from the LED lamps 115 can directly illuminate the display screen 102. In addition, the diffused light can be reflected by the inner wall surface 106 of the housing 104 and can be more concentratedly illuminated to the display screen 102, thereby improving the light utilization rate of the backlight source 103.

[0043] Furthermore, the side of the housing 104 where the backlight source 103 is mounted can be open to facilitate mounting of the backlight source 103. The mounting plate 114 of the backlight source 103 is mounted to the bottom of the housing 104. The second reflective surface 119b can be formed as follows: the mounting plate 114 can be made of a material such as mirror-finished stainless steel or a high-purity aluminum plate. Alternatively, a reflective material or a reflective film layer can be attached to the mounting surface 116 of the mounting plate 114. Specifically, the mounting surface 116 of the mounting plate 114 of the backlight source 103 where the LED lamp 115 is mounted serves as the second reflective surface 119b.

[0044] In addition, the display device 100 of the embodiment may further include at least one of a diffuser 117, a condenser 118, and a light guide (not shown) sandwiched between the display screen 102 and the housing 104. For example, the display device 100 of the embodiment may include a diffuser 117, which is sandwiched between the display screen 102 and the housing 104. For example, the diffuser 117 may be attached to a side of the frame 101 located at the housing 104 and is located between the backlight source 103 and the display screen 102. In addition, the display device 100 of the embodiment may further include a condenser 118, which is sandwiched between the diffuser 117 and the backlight source 103. By providing the diffuser 117, the uniformity and quality of the display image of the display screen 102 can be improved. In addition, by providing the condenser 118, the light emitted by the backlight source 103 can be accurately controlled and guided. Alternatively, the display device 100 of the embodiment may further include a light guide (not shown), which is arranged between the display screen 102 and the housing 104. These optical devices may be used alone or in combination.

[0045] In the display device 100 of the embodiment, by using the reflector 105 to cover part of the designed display area 107 of the display screen 102 (i.e., the unnecessary display area 107b), not only can the size of the display screen be controlled according to the actual needs of the HUD device 200, but the light source irradiated on these unnecessary display areas 107 can be reflected back and then reused through the shell 104 with the reflective surface 119, thereby improving the light utilization rate of the backlight source 103.

[0046] In the display device 100 of the embodiment, by attaching a reflective film to the back surface of the display screen 102, the area not required for display within the designed display area 107 of the display screen 102 can be easily shielded. Furthermore, by providing a cover plate 110 that is attached to the frame 101 from the front side of the display screen 102, and by having the shielding portion 111 of the cover plate 110 shield the area 107b not required for display within the designed display area 107 of the display screen 102, the area required for display can be precisely defined.

[0047] Furthermore, by attaching a reflective film to the back of the display screen 102, the difficulty and cost of the assembly process can be reduced. For example, the reflective film can be attached during the manufacturing process of the display screen 102 without adding other complex assembly processes.

[0048] In the display device 100 of the embodiment, by gradually increasing the cross-section of the shell 104 from the side of the backlight source 103 toward the side of the frame 101, a reflecting surface 119 (first reflecting surface 119a) can be easily formed on the inner wall surface 106 of the shell 104, and the first reflecting surface 119a can not only reflect the light from the backlight source 103, but also reflect the light reflected from the reflector 105, thereby further improving the light utilization rate of the backlight source 103.

[0049] In addition, although the frame 101 is described as a rectangular frame example above, it is not limited thereto and can be configured to be circular, elliptical, or various irregular shapes according to actual product requirements.

[0050] Although the above description shows an example in which the actual use area 107a is rectangular, the present invention is not limited thereto and the actual use area 107a may also be configured in a circular shape, an elliptical shape, or various irregular shapes according to actual product requirements.

[0051] While the reflective member 105 is described above as an example of a reflective film, this is not limiting. The reflective member 105 may also be a reflective plate, which is mounted on the frame 101 and substantially in contact with the back side of the display screen 102. The material of the reflective plate is also not particularly limited and can be, for example, various light-reflecting materials such as mirror-finished stainless steel and high-purity aluminum.

[0052] Furthermore, although the above description describes an example in which the reflector 105 is attached to the back side of the display screen 102, the present invention is not limited thereto. The reflector 105 may also be mounted on the frame 101 and shield the unnecessary display area 107b of the designed display area 107 of the display screen 102 in the direction in which the display screen 102 and the backlight 103 face each other.

[0053] Furthermore, although the reflective surface 119 includes the first reflective surface 119a formed on the inner wall surface 106 of the housing 104, the present invention is not limited thereto. For example, the housing 104 may be formed as a rectangular tube. In this embodiment, the second reflective surface 119b may be formed only on the bottom of the housing 104, and the second reflective surface 119b primarily reflects light reflected from the reflector 105.

[0054] Alternatively, although the above description describes an example where the reflective surface 119 includes the second reflective surface 119 b formed on the bottom of the housing 104 , the present invention is not limited thereto. For example, the reflective surface 119 may also only form the first reflective surface 119 a on the inner wall surface 106 of the housing 104 .

[0055] While the above description describes an example in which the mounting plate 114 of the backlight 103 and the display screen 102 are parallel to each other, this is not limiting. As long as light from the backlight 103 can effectively illuminate the back side of the display screen 102, the mounting plate 114 of the backlight 103 can be tilted at various angles relative to the display screen 102. For example, alternative optical paths can be provided between the mounting plate 114 and the display screen 102, thereby easily changing the relative position and angle of the display screen 102 and the backlight 103 as needed.

[0056] Reference Figure 3 The display device 100 of the embodiment can be used in the HUD device 200. Since the display device 100 can improve the light utilization efficiency of the backlight source 103, the brightness of the display content of the HUD device 200 can be enhanced as a whole.

[0057] The HUD device 200 of the second embodiment can, for example, have a typical HUD device structure. The HUD device 200 includes a housing 201, an optical assembly 202, and the aforementioned display device 100. The housing 201 has a housing cavity 203 and a window 204, which connects the housing cavity 203 to the outside. The display device 100 and the optical assembly 202 are respectively housed within the housing cavity 203. The optical assembly 202 is located between the window 204 and the display device 100, transmitting display information from the display surface of the display device 100 to the outside of the housing 201 through the window 204.

[0058] The window portion 204 of the housing 201 faces the windshield of the car, and the optical component 202 includes, for example, a reflector 205 and a lens 206. The reflector 205 is located below the window portion 204, and the lens 206 is located, for example, between the reflector 205 and the display device 100. Thus, the display information of the display device 100 is transmitted to the outside of the housing 201 via the window portion 204.

[0059] Although examples of the present embodiment have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and intent of the present embodiment, and the scope of the present embodiment is defined by the claims and their equivalents.

Claims

1. A display device, characterized in that include: frame; a display screen mounted on one side of the frame; a backlight source, disposed on the other side of the frame, emitting light to the display screen; a housing, one end of which is mounted to the frame, the backlight source being mounted to the other end of the housing, a reflective surface being formed inside the housing, the backlight source and the back side of the display screen being opposite to each other within a space surrounded by the housing; The reflector is arranged in the space surrounded by the shell and covers the unnecessary display area in the designed display area of ​​the display screen. The reflector is opposite to the reflective surface.

2. The display device according to claim 1, wherein The frame has a first opening in the middle; The display screen has a non-display area on all four edges, and the non-display area surrounds the designed display area; The display screen is mounted to the frame in the non-display area, and the designed display area is exposed in the first opening.

3. The display device according to claim 1, wherein The reflector is attached to the back of the display screen and covers the unnecessary display area.

4. The display device according to claim 3, wherein: The design display area is a rectangular area, and the reflective member covers one long side or one short side of the design display area, or the reflective member surrounds the design display area and covers four edges of the design display area.

5. The display device according to any one of claims 1 to 4, characterized in that Also included is a cover plate mounted to the frame from the front side of the display screen; The cover plate is formed with a shielding portion, which shields an unnecessary display area in the designed display area of ​​the display screen.

6. The display device according to any one of claims 1 to 4, characterized in that The reflective element is a reflective film.

7. The display device according to claim 1, wherein The reflective surface includes a first reflective surface formed on the inner wall surface of the shell, and / or a second reflective surface formed on the bottom of the shell.

8. The display device according to claim 1 or 7, characterized in that: The housing is formed so that a cross section gradually increases from a side of the backlight source toward a side of the frame.

9. The display device according to claim 8, wherein The frame is in a rectangular shape, and a first rectangular opening is provided in the middle of the frame; The housing has four flat-plate-shaped side walls, and the four side walls are connected to each other to define the rectangular cross section; The housing has a second rectangular opening formed at one end mounted on the frame, and the second opening is symmetrically opposite to the first opening.

10. The display device according to claim 7, wherein: The shell is made of a reflective material, or a reflective layer is formed on the inner wall surface, or a reflective device is installed on the inner wall surface.

11. The display device according to claim 7, wherein The backlight source includes a mounting plate, the mounting plate is mounted to the bottom of the housing, and the second reflective surface is formed on the mounting plate.

12. The display device according to claim 1, 10 or 11, characterized in that: It also includes at least one of a diffusion member, a light focusing member and a light guiding member sandwiched between the display screen and the housing.

13. A HUD device, characterized in that A display device according to any one of claims 1 to 12.

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